Objective: The present study investigated the performance of Mindfulness according to the Cognitive approach on the Quality of Life and Loneliness of women with HIV.

Methods: This research is a semi-experimental with pretest-posttest and check team, which was conducted in winter, 2014. In this research, 24 positive HIV women in Tehran were selected by volunteers sampling method and were stochastically related to either the control team (n = 12) or the MBCT groups (n = 12) and, the World Health Organization quality of life survey and the University of California Los Angeles loneliness scale were administrated as pretest. The MBCT team got eight sessions of mindfulness according to the cognitive theory and the check team got no intervention. At the end, the post-test was administrated to two groups and, covariance method was used for data analysis by SPSS-20 software.

Findings: The results of the present study indicated that there were clear variations among the test groups check group and MBCT (p < 0.001). Therefore, Mindfulness-based Cognitive theory increased the mean quality of life and decreased loneliness.

Conclusion: The findings indicated that the Mindfulness-based Cognitive therapy increased the quality of life and decreased loneliness in positive HIV women. Therefore, in order to modify the quality of life and loneliness in these cases, attention to these variables during clinical trials with the goal of an appropriate intervention, will be beneficial.